Catalytic effects of sulfates on thermal degradation of waste poly(methyl methacrylate)

The thermal degradation of waste poly(methyl methacrylate) (PMMA) in the presence of ferric sulfate, cupric sulfate, aluminum sulfate, magnesium sulfate, and barium sulfate was studied by using thermogravimetric analysis (TGA) in air atmosphere. The values of apparent activation energies (E a ) calc...

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Bibliographic Details
Published in:Thermochimica acta 2005-09, Vol.435 (1), p.64-67
Main Authors: Xi, G.X., Song, S.L., Liu, Q.
Format: Article
Language:English
Subjects:
Applied sciences
Catalytic effect
Chemical reactions and properties
Degradation
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polymer industry, paints, wood
Sulfate
Technology of polymers
Thermal degradation
Thermogravimetry
Waste poly(methyl methacrylate)
Waste treatment
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Summary:The thermal degradation of waste poly(methyl methacrylate) (PMMA) in the presence of ferric sulfate, cupric sulfate, aluminum sulfate, magnesium sulfate, and barium sulfate was studied by using thermogravimetric analysis (TGA) in air atmosphere. The values of apparent activation energies (E a ) calculated by Flynn–Wall–Ozawa method were found to be in the order of PMMA + Fe 2(SO 4) 3 < PMMA + Al 2(SO 4) 3 < PMMA + MgSO 4 < PMMA + CuSO 4 < PMMA + BaSO 4 < PMMA. The mechanism of catalytic degradation of PMMA in presence of the sulfates was discussed and the results showed that the catalytic effects of sulfates have a relationship with the acidity of their respective metal ions.
ISSN:0040-6031
1872-762X
DOI:10.1016/j.tca.2005.05.005